diff --git a/.circleci/config.yml b/.circleci/config.yml
index ea10aed..5b8e50f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -7,7 +7,7 @@ jobs:
   build:
     docker:
       # specify the version you desire here
-      - image: circleci/node:8.11.1
+      - image: circleci/node:12.16.3
 
       # Specify service dependencies here if necessary
       # CircleCI maintains a library of pre-built images
diff --git a/scripts/make_doc.sh b/scripts/make_doc.sh
index 88a12ad..6d1bf3a 100755
--- a/scripts/make_doc.sh
+++ b/scripts/make_doc.sh
@@ -1,73 +1,35 @@
 #!/usr/bin/env bash
 set -e
 
+# we'll modify files in src/ and then revert our changes using
+# git checkout src/* so make sure they have no local changes
+if git status --porcelain | grep 'src/'; then
+    echo "Can't generate the docs when the git checkout isn't clean"
+    exit 1
+fi
+
 npm install --no-package-lock
 tsc -p tsconfig.docgen.json
 
 # https://github.com/TypeStrong/typedoc/issues/564
 # i would like typedoc to group functions in categories but it's not supported
 # yet. So I hack it with their support for external modules...
-
-# we'll modify the files and then revert our changes using
-# git reset --HARD so make sure there are no local changes
-if [[ $(git status --porcelain) ]]; then
-    echo "Can't generate the docs when the git checkout isn't clean"
-    exit 1
-fi
-
-# pre-process files
 node dist/scripts/make_doc_extra/make_doc_preprocess.js
 
 # trick for the 'Option' & 'Either' constants which typedoc skips as it clashes
 # with the 'Option' & 'Either' type synomym
-sed -i "s/const Option/const optionGlabiboulga/" src/Option.ts
-sed -i "s/const Either/const eitherGlabiboulga/" src/Either.ts
-sed -i "s/const LinkedList/const linkedListGlabiboulga/" src/LinkedList.ts
-sed -i "s/const Stream/const streamGlabiboulga/" src/Stream.ts
-sed -i "s/const Function0/const function0Glabiboulga/" src/Function.ts
-sed -i "s/const Function1/const function1Glabiboulga/" src/Function.ts
-sed -i "s/const Function2/const function2Glabiboulga/" src/Function.ts
-sed -i "s/const Function3/const function3Glabiboulga/" src/Function.ts
-sed -i "s/const Function4/const function4Glabiboulga/" src/Function.ts
-sed -i "s/const Function5/const function5Glabiboulga/" src/Function.ts
-sed -i "s/const Predicate/const predicateGlabiboulga/" src/Predicate.ts
+node dist/scripts/make_doc_extra/replace_in_ts.js
 
 # generate with typedoc
 ./node_modules/typedoc/bin/typedoc --exclude "**/make_doc_extra/*.ts" --mode file --out apidoc --excludePrivate --excludeExternals --excludeNotExported --ignoreCompilerErrors --tsconfig tsconfig.prepublish.json src/index.ts
 
 # revert the 'Option' & 'Either' constant rename
-find apidoc -name "*.html" -exec sed -i 's/optionglabiboulga/Option/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/option<wbr>Glabiboulga/Option/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/eitherglabiboulga/Either/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/either<wbr>Glabiboulga/Either/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/linkedlistglabiboulga/LinkedList/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/linked<wbr>List<wbr>Glabiboulga/LinkedList/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/streamglabiboulga/Stream/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/stream<wbr>Glabiboulga/Stream/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function0glabiboulga/Function0/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function0<wbr>Glabiboulga/Function0/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function1glabiboulga/Function1/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function1<wbr>Glabiboulga/Function1/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function2glabiboulga/Function2/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function2<wbr>Glabiboulga/Function2/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function3glabiboulga/Function3/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function3<wbr>Glabiboulga/Function3/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function4glabiboulga/Function4/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function4<wbr>Glabiboulga/Function4/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function5glabiboulga/Function5/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/function5<wbr>Glabiboulga/Function5/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/predicateglabiboulga/Predicate/g' \{\} \;
-find apidoc -name "*.html" -exec sed -i 's/predicate<wbr>Glabiboulga/Predicate/g' \{\} \;
-
-# modify the output to say 'File' instead of 'Module'
-find apidoc -name "*.html" -exec sed -i 's/Module/File/g' \{\} \;
+node dist/scripts/make_doc_extra/replace_in_html.js
 
-# modify the paths to say 'files' instead of 'modules'
 mv apidoc/modules apidoc/files
-find apidoc -name "*.html" -exec sed -i 's/modules/files/g' \{\} \;
 
 node dist/scripts/make_doc_extra/make_doc_extra.js
 
 # we're happy with the output now, revert the changes I made
 # to the files to make typedoc think they're external modules
-git reset --hard HEAD
+git checkout src/*
diff --git a/scripts/make_doc_extra/replace_in_html.ts b/scripts/make_doc_extra/replace_in_html.ts
new file mode 100644
index 0000000..0402e9f
--- /dev/null
+++ b/scripts/make_doc_extra/replace_in_html.ts
@@ -0,0 +1,36 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { FILE_REPLACEMENTS, replaceInFile, SimpleReplacement } from './replacements';
+
+async function main() {
+    const allHtmlReplacements = FILE_REPLACEMENTS
+        .flatMap(([_, constReplacement]) => constReplacement.htmlReplacements)
+        .appendAll([
+            new SimpleReplacement('Module', 'File'),
+            new SimpleReplacement('modules', 'files'),
+        ]);
+
+    const promises: Promise<void>[] = [];
+    for await (const htmlFile of findHtml('apidoc')) {
+        promises.push(replaceInFile(htmlFile, allHtmlReplacements));
+    }
+    return Promise.all(promises);
+}
+
+async function* findHtml(dir: string): AsyncIterableIterator<string> {
+    const children = await fs.promises.readdir(dir, {withFileTypes: true});
+    for (const child of children) {
+        if (child.isDirectory()) {
+            yield *findHtml(path.join(dir, child.name))
+        } else if (child.isFile() && child.name.endsWith('.html')) {
+            yield path.join(dir, child.name);
+        }
+    }
+}
+
+main()
+    .then()
+    .catch(err => {
+        console.error(err);
+        process.exit(1);
+    });
diff --git a/scripts/make_doc_extra/replace_in_ts.ts b/scripts/make_doc_extra/replace_in_ts.ts
new file mode 100644
index 0000000..c7856be
--- /dev/null
+++ b/scripts/make_doc_extra/replace_in_ts.ts
@@ -0,0 +1,18 @@
+import { replaceInFiles, FILE_REPLACEMENTS, SimpleReplacement } from './replacements';
+import { Vector } from '../../src';
+
+
+function main() {
+    return FILE_REPLACEMENTS
+        .map<[string, Vector<SimpleReplacement>]>(
+            ([file, replacement]) => [file, replacement.tsReplacements]
+        )
+        .transform(replaceInFiles);
+}
+
+main()
+    .then()
+    .catch(err => {
+        console.error(err);
+        process.exit(1);
+    });
diff --git a/scripts/make_doc_extra/replacements.ts b/scripts/make_doc_extra/replacements.ts
new file mode 100644
index 0000000..8eb1bd9
--- /dev/null
+++ b/scripts/make_doc_extra/replacements.ts
@@ -0,0 +1,101 @@
+import * as fs from 'fs';
+import * as readline from 'readline';
+import { Vector } from '../../src';
+import * as path from 'path';
+
+export class SimpleReplacement {
+    readonly src: RegExp;
+    readonly trg: string;
+
+    constructor(_src: string, _trg: string) {
+        if (!_src.match(/^[a-zA-Z0-9<> ]+$/)) {
+            throw new Error('Not safe for regex: ' + _src);
+        }
+        this.src = new RegExp(_src, 'g');
+        this.trg = _trg;
+    }
+}
+
+const SUFFIX = 'Glabiboulga';
+
+export class ConstReplacement {
+    readonly tsReplacements: Vector<SimpleReplacement>;
+    readonly htmlReplacements: Vector<SimpleReplacement>;
+
+    constructor(constNames: string | Vector<string>) {
+        const constNamesVector = constNames instanceof Vector ? constNames : Vector.of(constNames);
+        this.tsReplacements = constNamesVector
+            .map(constName => new SimpleReplacement(
+                `const ${constName}`,
+                `const ${constName}${SUFFIX}`,
+            ));
+
+        this.htmlReplacements = constNamesVector
+            .flatMap(constName => Vector.of(
+                new SimpleReplacement(
+                    `${constName}${SUFFIX}`.toLowerCase(),
+                    constName,
+                ),
+                new SimpleReplacement(
+                    this.insertWbrBetweenParts(`${constName}${SUFFIX}`),
+                    constName,
+                )
+            ));
+    }
+
+    /**
+     * CamelCase42Name -> Camel<wbr>Case42<wbr>Name
+     */
+    private insertWbrBetweenParts(text: string): string {
+        if (!text.match(/^[A-Z]/)) {
+            throw new Error('Must start with capital letter: ' + text);
+        }
+
+        const part = /[A-Z][^A-Z]*/g;
+        function* parts(): IterableIterator<string> {
+            for ( ; ; ) {
+                const res = part.exec(text);
+                if (!res) {
+                    return;
+                }
+                yield res[0];
+            }
+        }
+        return Vector.ofIterable(parts()).mkString('<wbr>');
+    }
+}
+
+export const FILE_REPLACEMENTS = Vector.of<[string, ConstReplacement]>(
+    [path.join('src', 'Option.ts'), new ConstReplacement('Option')],
+    [path.join('src', 'Either.ts'), new ConstReplacement('Either')],
+    [path.join('src', 'LinkedList.ts'), new ConstReplacement('LinkedList')],
+    [path.join('src', 'Stream.ts'), new ConstReplacement('Stream')],
+    [path.join('src', 'Function.ts'), new ConstReplacement(Vector.of(0, 1, 2, 3, 4, 5).map(i => `Function${i}`))],
+    [path.join('src', 'Predicate.ts'), new ConstReplacement('Predicate')],
+)
+
+export function replaceInFiles(fileReplacements: Vector<[string, Vector<SimpleReplacement>]>): Promise<void[]> {
+    const promises = fileReplacements
+        .map(([file, replacements]) => replaceInFile(file, replacements));
+    return Promise.all(promises);
+}
+
+export async function replaceInFile(file: string, replacements: Vector<SimpleReplacement>): Promise<void> {
+    return new Promise<string>(async (resolve, reject) => {
+        const inInterface = readline.createInterface({input: fs.createReadStream(file)});
+        try {
+            const lines: string[] = [];
+            for await (const line of inInterface) {
+                lines.push(
+                    replacements
+                        .foldLeft(line, (l, repl) => l.replace(repl.src, repl.trg))
+                );
+            }
+            resolve(lines.map(l => l + '\n').join(''));
+        } catch (err) {
+            reject(err);
+        } finally {
+            inInterface.close();
+        }
+    }).then(lines => fs.promises.writeFile(file, lines));
+}
diff --git a/tsconfig.benchmarks.json b/tsconfig.benchmarks.json
index 4f325e4..1f0739a 100644
--- a/tsconfig.benchmarks.json
+++ b/tsconfig.benchmarks.json
@@ -1,5 +1,5 @@
 {
-    "extends": "./tsconfig.base.json",
+    "extends": "./tsconfig.json",
     "include": [
         "src/**/*",
         "benchmarks/**/*"
diff --git a/tsconfig.docgen.json b/tsconfig.docgen.json
index 957108d..261608d 100644
--- a/tsconfig.docgen.json
+++ b/tsconfig.docgen.json
@@ -1,5 +1,5 @@
 {
-    "extends": "./tsconfig.base.json",
+    "extends": "./tsconfig.json",
     "include": [
         "src/**/*",
         "scripts/**/*"
diff --git a/tsconfig.base.json b/tsconfig.json
similarity index 76%
rename from tsconfig.base.json
rename to tsconfig.json
index de67ba6..8e78909 100644
--- a/tsconfig.base.json
+++ b/tsconfig.json
@@ -10,6 +10,9 @@
         "outDir": "./dist",
         "declaration": true,
         "sourceMap": true,
-        "lib": ["es2015", "dom"] // I need DOM because of typedoc..
-    }
+        "lib": ["es2015", "dom", "esnext.asynciterable"]
+    },
+    "include": [
+        "**/*"
+    ]
 }
diff --git a/tsconfig.prepublish.json b/tsconfig.prepublish.json
index 5b85fa1..6b00026 100644
--- a/tsconfig.prepublish.json
+++ b/tsconfig.prepublish.json
@@ -1,5 +1,8 @@
 {
-    "extends": "./tsconfig.base.json",
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "lib": ["es2015", "dom"]
+    },
     "include": [
         "src/**/*"
     ]
diff --git a/tsconfig.test.json b/tsconfig.test.json
index 02bdc2a..52d80a5 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -1,5 +1,5 @@
 {
-    "extends": "./tsconfig.base.json",
+    "extends": "./tsconfig.json",
     "include": [
         "src/**/*",
         "tests/**/*"